When to Plant Scarlet Runner Beans in Ridgefield, WA

One of the first steps you take when you are making a decision about your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A way of estimating when you can plant scarlet runner beans is to refer to the USDA zone info for Ridgefield.

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Planting Calendar for Scarlet Runner Beans

Frost tolerance for scarlet runner beans: Not tolerant of frost.
When to plant: After the last frost has passed.

You can not plant scarlet runner beans until after the last frost because they require warm weather.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant scarlet runner beans
Possibly ok, but a risky time to plant scarlet runner beans
Probably not a good time to plant scarlet runner beans

The earliest that you can plant scarlet runner beans in Ridgefield is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant scarlet runner beans and expect a good harvest is probably August. Any later than that and your scarlet runner beans may not have a chance to fully mature. Starting your scarlet runner beans indoors is a great way to get them started a little bit earlier.

Last Frost Date

In Ridgefield the average date of last frost happens on March 15. In the coldest months of winter you can expect an average low temperature of 15°F.

Since the USDA zone info for Ridgefield may not be accurate from year to year the actual date of last frost will vary from year to year. Half of the time in Ridgefield last frost occurs after March 15 so be sure to be ready to cover your scarlet runner beans in the event of one of those late frosts.

USDA Zone Info for Ridgefield

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)March 15
Average Date of First Frost (fall)November 15
Lowest Expected Low15°F
Highest Expected Low20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Ridgefield

You may be interested in your other planting guides for Ridgefield.